Pattern formation is the process that results in the spatial organization of a tissue or organism. It is inextricably linked to morphogenesis, the creation of body form.
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In development of flowering plants, organ identity genes encode transcription factors that result in the differentiation of floral organs.
Genetic and experimental lines of evidence support the floral organ determination model.
A cascade of gene expression events early in development establishes the differentiation of growth axes and organ formation in the fruit fly embryo.
Alterations of Hox genes can result in homeotic mutations.